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.net 过滤特殊字符

作者:佚名      ASP.NET网站开发编辑:admin      更新时间:2022-07-23

.net 过滤特殊字符

/// <summary> /// 过滤标记 /// </summary> /// <param name="NoHTML">包括HTML,脚本,数据库关键字,特殊字符的源码 </param> /// <returns>已经去除标记后的文字</returns> public string NoHTML(string Htmlstring) {   if (Htmlstring == null)   {     return "";   }   else   {     //删除脚本     Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);     //删除HTML     Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"([/r/n])[/s]+", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);

    Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "/xa1", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "/xa2", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "/xa3", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "/xa9", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, @"&#(/d+);", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);

    //删除与数据库相关的词     Htmlstring = Regex.Replace(Htmlstring, "select", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "insert", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "delete from", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "count''", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "drop table", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "truncate", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "asc", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "mid", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "char", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "exec master", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "net localgroup administrators", "", RegexOptions.IgnoreCase);     Htmlstring = Regex.Replace(Htmlstring, "and", "", RegexOptions.IgnoreCase);

    return Htmlstring;

  }

}